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<html lang="cn">
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    <meta charset="UTF-8">
    <title>Document</title>
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<body>
    <h1>JS 函数</h1>
    <hr>

    <script>
        function demo() {
            console.log('demo....');
            // return '12345';
        }
        demo();

        // console.log(demo());

        function demo() {
            console.log('呆毛....');
        }
        demo();
        

    </script>
</body>
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